//
//  A.h
//  KVO_Demo
//
//  Created by meitianhui2 on 2017/12/20.
//  Copyright © 2017年 DeLongYang. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface A : NSObject

@property (nonatomic,copy)NSString *aName;

@property (nonatomic,assign)int age;

@end
